[Rhodes22-list] Fractured stern plate.

[Pat & Mary Ann]

Mike
Thanks for the thoughtful message.  I'm planing to have the problem plate 
replicated over the winter so it's ready to go in the spring.
Pat.
----- Original Message ----- 
From: "Michael D. Weisner" <mweisner at ebsmed.com>
To: "The Rhodes 22 Email List" <rhodes22-list at rhodes22.org>
Sent: Wednesday, September 22, 2010 10:09 AM
Subject: Re: [Rhodes22-list] Fractured stern plate.


> Hi Pat,
>
> As an engineer, the problem appears to be caused by one (or more) problems
> as follows:
>    1.    Motor weight exceeds design specification
>    2.    Live load (motor, waves, wind, etc.) exceeds design specification
>    3.    Improper structural material formulation or specification
>    4.    Damage or abuse (backed into fixed object, collision, etc.
>    5.    Storm damage
>
> Since I must assume that Stan built the motor lift and provided the 
> engine,
> one must assume that #1 is out.  As good as Stan is, engineers do revise
> their designs to correct "oversights."  It is entirely possible that as 
> the
> 4-cycle electric start engine weights continue to increase, the design of
> the lift may need to be redesigned (#1, #2 & #3.)  An aluminum plate would
> seem to indicate that such a process has already been started at GBI.
>
> If designed properly, you should not be capable of damaging the lift by
> having "raised the Yamaha too high."  IMHO, the only time that you could 
> be
> at fault would be in cases like #4.
>
> Is it safe to sail?  Well, make sure that your safety chain is in good 
> shape
> and of the correct length so that you do not lose the motor should the 
> plate
> fail.  You could also have difficulty raising or lowering the motor if the
> damage affects the mechanism.  Also, be careful since the cracked material
> can be very sharp.
>
> Mike
> s/v Shanghai'd Summer ('81)
> Nissequogue River, NY
>
> From: "Pat & Mary Ann" Tuesday, September 21, 2010 9:07 PM
>> Hello all,
>> This summer I notied a progresse, increasing series of cracks in the 
>> stern
>> plate.  I asked Stan about it and he thought it would be safe to sail til
>> Labor Day, then pull the plate and replace it with an aluminum replica.
>> Has anyone had a similar problem?  I wonder if it is because I raised the
>> Yamaha too high.  Any other suggestions for repair or replacement?
>> Pat Devig
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